steps

##Youtube Link: https://www.youtube.com/watch?v=saXjuWG4PeU

#Kubernetes Installation pre-requisites:

########

#Reference URL: http://kubecloud.io/setup-ha-k8s-kops/

1. Kops 						: The utility used to install the kubernetes cluster
2. Kubectl 						: The kubernetes command line tool used to manage the cluster
3. Domain configured at Route53 : All the URL entries are created under this zone id which are also updated dynamically by the cluster.
4. S3 Bucket				    : Used to store the Cluster configuration that is used by kops.
5. AWS Cli						

#The below command specifies:
1. VPC id in which we want to create the cluster.
2. Node count
3. Master count (1 master will be created in each AZ).
4. Availability zones in which the master/node instances will span.
5. Route53 Hosted zone id
6. Master/node instance types
7. Subnets to be used.
8. Volume size of the master/node instances.

Procedure:
1. Create a S3 bucket.

2. AWS Cli Installation:
apt-get install -y awscli;
aws configure set aws_access_key_id YOURACCESSKEY;
aws configure set aws_secret_access_key YOURSECRETKEY;
aws configure set default.region ap-south-1;


3. Kops Installation:
#Reference URL: https://github.com/kubernetes/kops

wget https://github.com/kubernetes/kops/releases/download/1.8.0/kops-linux-amd64
chmod +x kops-linux-amd64
mv kops-linux-amd64 /usr/local/bin/kops

4. Kubectl Installation:
#Reference URL: https://kubernetes.io/docs/tasks/tools/install-kubectl/

curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl
chmod +x ./kubectl
mv ./kubectl /usr/local/bin/kubectl

5. Kops uses an id_rsa.pub file to be used for the created instances which i have used as below:
cp /home/ubuntu/.ssh/authorized_keys /root/.ssh/id_rsa.pub


kops create cluster --node-count 3 --name=domain.com --zones us-east-1a,us-east-1b,us-east-1c \
    --master-zones us-east-1a,us-east-1b,us-east-1c \
    --state s3://domain.com \
    --dns-zone=Z1A3BXE5N40766 \
    --dns public \
    --node-size t2.micro \
    --master-size t2.micro \
    --topology public \
    --networking weave \
    --vpc=vpc-fc505c84 
	
	
	
	
#Reference URL: https://github.com/kubernetes/kops/blob/master/docs/addons.md

----------------------------
#Dashboard Installation:
----------------------------
kubectl create -f https://raw.githubusercontent.com/kubernetes/kops/master/addons/kubernetes-dashboard/v1.7.1.yaml

The login credentials are:

    Username: admin
    Password: get by running "kops get secrets kube --type secret -oplaintext" or "kubectl config view --minify"
	
The Dashboard URL pattern is like below:

https://api.$domain/api/v1/namespaces/kube-system/services/kubernetes-dashboard/proxy/#!/namespace?namespace=_all

As In our case:

https://api.domain.com/api/v1/namespaces/kube-system/services/kubernetes-dashboard/proxy/#!/namespace?namespace=_all


#Specifying the subnets to be used as below with the 'kops edit cluster' command:

--------------------------------
  subnets:
  - cidr: 10.0.128.0/19
    id: subnet-e07612bd			# Use this to specify the subnets if they are already created.
    name: us-east-1a
    type: Public
    zone: us-east-1a
  - cidr: 10.0.160.0/19
    id: subnet-b52870d1			# Use this to specify the subnets if they are already created.
    name: us-east-1b
    type: Public
    zone: us-east-1b
  - cidr: 10.0.192.0/19 
    id: subnet-6eaaca41			# Use this to specify the subnets if they are already created.
    name: us-east-1c
    type: Public
    zone: us-east-1c
---------------------------------

#Specifying the root volume size for the instances as below:  
--------------------------------------------------------------
	spec:
  machineType: t2.medium
  maxSize: 2
  minSize: 2
  role: Node
  rootVolumeSize: 100
  rootVolumeType: gp2
----------------------------------------------------

## Sample Application:
#Reference URL: https://github.com/microservices-demo/microservices-demo/tree/master/deploy/kubernetes

#To Install the application:

kubectl create namespace sock-shop
kubectl apply -n sock-shop -f "https://github.com/microservices-demo/microservices-demo/blob/master/deploy/kubernetes/complete-demo.yaml?raw=true"

#Open the worker node IP with port 30001 on browser. 
#Note, we need to open the port in node security group.